Question: What was Sagittarius A, discovered by Andrea M. Ghez?
Paraphrase: which one was the Sagittarius A, discovered by Andrea M. Ghez
SPARQL (Wikidata): SELECT ?value WHERE { wd:Q237284 p:P61 ?s . ?s ps:P61 wd:Q493956 . ?s pq:P518 ?value}